GEOGRAPHY

Arid landforms are as a result of many combined factors, one reacting upon the other. Insufficient rainfall, often less than 127 mm (5 inches), coming at most irregular periods, coupled ...

Man's universal demand for food, clothing, shelter and other comforts of life has prompted the creation of many new things. Foods are preserved or canned to last longer. Modern homes ...

About a fifth of the world's land is made up of deserts, some rocky, others stony and the rest sandy. Deserts that are absolutely barren and where nothing grows at ...

Nature, properties and uses Iron is the commonest, cheapest and most versatile of all metals. It is, in fact, the basis of the modern industrial complex, About 90 percent of ...

Of the power sources, electricity is the cheapest. It is not exhaustible like coal or petroleum but is renewable. The French have aptly described it as 'white coal'. There are ...

Petroleum is mineral oil, organic in origin, and occurs in the pore spaces of sedimentary rocks. It is derived from the decomposition of marine or vegetative matter. It normally occurs ...

Coal, comprising mainly carbon of vegetative origin, is one of the oldest forms of power. It provided the basis for the Industrial Revolution. Its importance as both fuel and raw ...

Minerals are natural, chemical substances which make up the rocks of the earth's crust. They have certain physical and chemical properties that differentiate them from one another. There are well ...

In the history of mankind perhaps the most disastrous eruptions were those of Mt. Vesuvius, Mt. Krakatoa and Mt. Pelee. Mt. Vesuvius Mt. Vesuvius, standing 1200m (4000 feet) above the ...

In tropical seas many kinds of coral animals and marine organisms such as coral polyps, calcareous algae, shell-forming creatures and lime-secreting plants live in large colonies. Though they are very ...